The Solar Wind Magnetosphere Ionosphere Link Explorer (SMILE) is a future spacecraft mission supported by the European Space Agency and the Chinese Academy of Science. It is expected that the mission will be launched in 2025 by ESA. SMILE will target the magnetopause, cusp, and bow shock regions. To investigate magnetosphere-ionosphere coupling, the spacecraft will take auroral images using an ultraviolet imager (UVI). For scientific support and analysis of data collected by the UVI, a numerical model of the ionosphere and UV emission has been developed, which is presented in the poster presentation. The photoelectron transport module of the model is described in the poster. The SMILE UV-imager will take global auroral images that for calibration, require specification of the changing state of the ionosphere. We demonstrate progress in meeting this goal and showcase using an example how the model works.